Weil-McLain ECO Tec 199-C
The ECO Tec 199-C is the flagship ECO Tec combi: 199 MBH input with the line's strongest DHW delivery — the CA page's "up to 5.4 GPM at 70°F rise" claim applies to this size — at 95.0% AFUE in a 135 lb unit.
Key figures
- Max input
- 199 MBH
- Max CSA output
- 184 MBH
- AFUE
- 95 %
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Weil-McLain ECO Tec 199-C in practice
The 199-C is the ECO Tec size behind Weil-McLain's headline DHW claim: the CA combi page's "up to 5.4 GPM at 70°F rise" figure corresponds to the 199-C, whose brazed plate DHW module fires to the same 199 MBH ceiling as the heating side. Heating ratings match the 199-H: 199 MBH input, 184 MBH DOE heating capacity, 160 MBH net AHRI at 95.0% AFUE.
Weighing 135 lb with 3.8 gallons of boiler water, the 199-C is the heaviest ECO Tec and keeps the line's one venting rule: 50 equivalent feet maximum in 2" pipe, 100 feet in 3". Heating water connections are 1" NPT male with a 1/2" NPT gas connection, and propane runs on an optional conversion kit.
Best suited to
- Larger homes with real simultaneous hot-water demand
- Combi systems where DHW flow, not just heating load, drives sizing
- Buyers who can run 3" venting for the full 100-ft allowance
Applicability and support
- Model number
- ECO Tec 199-C
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Weil-McLain. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, maximum | 199 MBH | CSA input (maximum). |
| Output | ||
| DOE heating capacity | 184 MBH | DOE heating capacity at maximum input; the manuals also call this CSA Output. |
| Net AHRI water rating | 160 MBH | Net AHRI rating per the boiler manual ratings table. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95.0% AFUE per the boiler manual ratings table. |
| Domestic hot water | ||
| Domestic hot water | Integrated combi: built-in DHW module with brazed plate heat exchanger | |
| Venting and air | ||
| Venting | 2" or 3" PVC, CPVC, polypropylene or AL29-4C stainless steel (Category IV) | Canada: install per CAN/CSA B149.1 or B149.2 with a ULC S636-compliant vent kit. |
| Max. equivalent vent/air length | 100 ft in 2" or 3" — 50 ft maximum in 2" for the 199 size | |
| Physical and connections | ||
| Weight | 135 lb | Boiler weight per the Weil-McLain product spec table. |
| Dimensions (L x W x H) | 19" x 20" x 33" | |
| Gas connection | 1/2" NPT male | |
| Heating water connections | 1" NPT male | Relief valve/air vent connection is 3/4" NPT. |
| Operating limits and other | ||
| Turndown | 10:1 | 10:1 turndown per the CA page and brochure. |
| Boiler water content | 3.8 gal | |
| Altitude rating | 2,000 ft | No modifications from sea level to 2,000 ft; the boiler auto-derates about 4% per 1,000 ft above sea level. |
| Fuel | Natural gas or propane | Propane requires a conversion kit per the CA product page. |
Manuals
- ECO Tec Series 2 Boiler Manual, 550-100-270/0924550-100-270/0924 · 2024-09
Alerts documented for this model
- control-not-receiving-24v-power
- control-not-receiving-120v-power
- display-communication-lost
- TEMP RISE TOO QUICKLY
- Communication errors
- Control fault
- LOW WTR CUTOFF OPEN
- RETURN > SUPPLY
- Boiler Output sensor or Flue sensor
- FLUE TEMP TOO HIGH
- LIMIT OPEN
- HIGH TEMP LIMIT
- FALSE FLAME
- GAS RELAY FAULT 1-4
- IGNITION 1 FAULT
- IGNITION 2 FAULT
- FLAME LOSS FAULT
- AIR PRESSURE Switch Open
- Closure Switch fault
- Configuration fault
- DHW Outlet > Boiler Out
- Internal Clock Fault
- Supply 60F > Return
- Flue 1 Sensor Open
- Flue 1 Sensor Short
- Flue 2 Sensor Open
- Flue 2 Sensor Short
- Boiler Out 1 Sensor Open
- Boiler Out 1 Sensor Short
- Boiler Out 2 Sensor Open
- Boiler Out 2 Sensor Short
- Boiler In Sensor Open
- Boiler In Sensor Short
- Blower Fault 1
- Blower Fault 2
- Blower Fault 3
- Wrong J6 Jumper
- Hardware A2D Fault
- Flame Circuit Fault
- Supply Sensor
- Return Sensor
- DHW Outlet Sensor
- Outdoor Sensor Error
- Exceeded Flow Rate
- Target Reduced - Flue
- Target Reduced - Boiler
- Target Reduced - Flow
- Clock Fault
- Software Incompatible
- Virtual Input Active
- Unconfigured Net 1 or Net 2 Demand
Frequently asked questions
Is 5.4 GPM at 70°F rise what the 199-C actually delivers?
Weil-McLain's brochure ties the 5.4 GPM at a 70°F rise figure to the 199 size; the CA combi page quotes it as an up-to figure for the range. Actual delivery depends on incoming water temperature.
What are the 199-C's heating ratings?
199 MBH input, 184 MBH DOE heating capacity, 160 MBH net AHRI and 95.0% AFUE, matching the 199-H.
Is 2" venting practical on the 199-C?
It is allowed to only 50 equivalent feet on the 199 size. Most installations run 3" pipe, which reaches 100 feet.
Questions about the Weil-McLain ECO Tec 199-C?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Compare and explore
Sources and verification
- Weil-McLain Canada — ECO Tec (Combi) · accessed September 7, 2026
- ECO Tec Series 2 Boiler Manual 550-100-270/0924 · 550-100-270/0924 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.